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FN7-12/24 DR model AC and HV indoor load break switch applies to three
-phase power supply system of rated voltage 12/24kV and AC 50/60Hz. It
used to switch on and off load-breaking current and short-circuit current. It is
made as per IEC62271-105.
| Technical Specification | |||||
| Rated voltage |
kV |
12 |
24 |
||
| Rated current |
A |
400 |
630 |
630 |
|
| Rated power frequency |
Hz |
50/60 |
50/60 |
50/60 |
|
| Short circuit making capacity |
kA Peak. |
31.5 |
50 |
50 |
|
| Peak withstand current |
kA Peak. |
31.5 |
50 |
50 |
|
| Short time current |
kA eff. |
||||
| 1Sec. |
25 |
25 |
25 |
||
| 3Sec. |
12.5 |
20 |
20 |
||
| Max. breaking capacity in co-operation with fuses IEC 62271-105 (IEC 420 1990-11) |
A |
1600 |
1600 |
900 |
|
| Max. fuse current(XRNT Fuse) |
A |
200 |
200 |
200 |
|
| Power frequency withstand voltage 50Hz 1 min,: | |||||
| – To earth and between poles |
kV |
42 |
42 |
55 |
|
| – Across isolating distance |
kV |
48 |
48 |
70 |
|
| Impulse withstand voltage 1.2/50μ s: | |||||
| – To earth and between poles |
kV |
75 |
75 |
125 |
|
| – Across isolating distance |
kV |
85 |
85 |
145 |
|
| Mechanism Endurance |
cycles |
2000 |
2000 |
2000 |
|
1. Arc Extinguishing Knife 2. Arc Contact Part and Arc Extinguishing Chamber 3. Insulator 4. Base
5. Dynamic Contact Knife 6. Static Contact Knife 7. Spring energy storage device (inside the main axis sleeve) 8. Main knife turning arm
Drawing 1 FN7-12 load switch outline and installation size
1.Main axis 2.Insulating rod 3.Blade 4.Contact 5.Arc contact
6.Arc extinguish chamber 7.Spring stored energy mechanism
8.On/Off operating arm
Drawing 2 FN7-24D load switch outline and installation size
We also offer complete set of FN7 parts with or without earthing switch.
Earthing Switch Parts:
FN7 load break switch parts:
Manufacturer of power transmission and distribution equipments.
We will contact you within 1 working day, please pay attention to the email with the suffix “@wolunele.com”.